I just passed through my third cluster without a headache by going on a low histamine diet during my regular cycle! Absolutely amazing. I’ve had regular spring/fall clusters for the past 14 years (with occasional smaller clusters in between). About 1 ½ years ago a naturopath suggested that I try a low histamine diet. I went on it about a month before I usually enter my spring cluster and stayed on it for the duration. Not one headache. I could definitely sense that things were going on and I had a few shadows but it never tipped over the edge. After that I went back to a normal diet until my normal fall cluster. Then I did the same thing with the same results. This spring I didn’t start the diet until I felt that I was about to enter a cluster and that worked OK. I was a little less strict this spring and did have to bust out the O2 once but I probably would have been OK without it. My level of understanding of the physiology of it isn’t that great but this is how I think about it. Our body makes histamines in response to allergens (and for other reasons). Foods contain them as well. If we avoid foods that contain lots of it we can lower our overall histamine levels. Then, when we’re in a cluster and our hypothalamus misfires and causes histamines to kick out and dilate our blood vessels and cause us horrendous pain, there’s simply not enough histamines to do the normal damage. I’m sure those of you more knowledgeable will tear that up. The overall histamine level is also why the traditional food-journal never helped me. There’s not one trigger. The orange you ate before you got a headache wasn’t necessarily the cause. The ham and Swiss you ate earlier was just as guilty. The food list is pretty long, and there are lots of variations of it out there. It’s a really annoying diet but totally worth it. Interestingly, I went to see the naturopath only after I had inadvertently put myself on a high-histamine diet. Typically my spring/fall clusters last 1-2 months but I was in one that had been going on for 4+ months and was worse than any I’d ever had. With my tools (O2, verapamil and imitrex) no longer being enough and me having a hard time getting an appointment with my neurologist I went to see a naturopath who I knew (who wasn’t familiar with cluster headaches but did some research and came up with an amazing shot in the dark). My inadvertent high-histamine diet was an anti-inflamatory, low-pH diet that I was trying. It turns out that my daily apple-cider vinegar tonics and pineapple/spinach smoothies were just about the worst things I could have done.